APPAREIL DE LEVAGE ET PROCEDE DE TRANSPLANTATION D'ARBRES

LIFT APPARATUS AND METHOD FOR TRANSPLANTING TREES

Abrégé français

L'invention se rapporte à un appareil de levage portable (10) et à un procédé visant à retirer un arbre planté ou mature pour le transporter et le transplanter dans un nouvel endroit, cet appareil comprenant un support de base (12) dimensionné de façon à entrer totalement dans une tranchée (14) creusée autour d'un arbre, et au moins un élément de levage hydraulique ou sous-pression (18) raccordé au support de base (12). Cet appareil de levage portable (10) est positionné sous un élément de support (32) placé sur un harnais de support (30) de la motte racinaire. L'élément de levage (18) est soigneusement mis en contact avec l'élément de support (32) de façon à pousser la motte racinaire et l'arbre vers le haut jusqu'à une hauteur désirée au-dessus du sol. La présente invention est notamment appropriée pour être utilisée dans la transplantation d'arbres matures et évite d'avoir recours à un équipement de levage motorisé, encombrant.

Abrégé anglais

A portable lift apparatus (10) and method for removing a planted or mature
tree for transport and transplanting in a new location utilizing a base
support (12) which is dimensioned so as to fit entirely within a trench (14)
dug about the base of a tree, and at least one hydraulic or pressurized
lifting member (18) connected to the base support (12). The portable lift
apparatus (10) is positioned below at least one support member (32) located on
a root ball support harness (30) wherein the lifting member (18) is
controllably brought into engagement with the support member (32) so as to
force the root ball and tree upward to a desired height from the ground. The
present invention is particularly suited for use with transplanting mature
trees because the need for large, motorized lift equipment is obviated.

Revendications

I CLAIM:
1. A portable nonvehicular apparatus for controllably
lifting a planted tree from the ground to permit transport of
the tree to a new location comprising:
a base support dimensioned to be positioned at the bottom
of a trench dug about the tree; and
at least one lift mechanism connected to said base
support, said lift mechanism comprising a moveable
component which can be brought into engagement with at
least one support element fastened to a root ball of
the tree, said moveable component having a range of
movement sufficient to lift at least a portion of the
root ball and tree to a desired height from the
ground.
2. The apparatus of claim 1 wherein said at least one
lift mechanism comprises two lift separate mechanisms.
3. The apparatus of claim 2 further comprising a
cross-member connected between the two lift mechanisms, wherein
said cross-member is brought into engagement with said at least
one support element by the two lift mechanisms.
4. The apparatus of claim 3 wherein the height of said
cross-member is relative to said base support is adjustable.
5. The apparatus of claim 1 wherein said at least one
lift mechanism comprises a hydraulic piston.
6. The apparatus of claim 1 wherein said at least one
lift mechanism comprises an air pressurized piston.
7. A method of removing a planted tree for transport
to a new location comprising the steps of:
digging a trench about a base of the tree so as to form a
suitable root ball;
- 6 -

enclosing said root ball with a support harness;
positioning at least one portable nonvehicular lift
apparatus at the bottom of the trench, said portable
lift apparatus comprising a base support dimensioned so
that the base support can fit at the bottom of the
trench, and at least one lift mechanism connected to
the base support having a moveable component integrally
formed therewith; and
lifting at least a portion of said root ball and tree a
desired height from the ground by controllably bringing
said moveable component into engagement with at least
one support element on said support harness and forcing
the at least one support element in an upward
direction.
8. The method of claim 7 wherein said at least one
lift mechanism comprises two separate lift mechanisms connected
to said base support, and wherein both moveable components are
brought into engagement with said at least one support element.
9. The method of claim 8 further comprising a
cross-member adjustably connected between the two separate lift
mechanisms, and wherein the moveable components bring said
cross-member into engagement with said at least one support
element.
10. The method of claim 7 wherein said positioning step
comprises positioning two portable lift apparatus at the bottom
of the trench on opposing sides of the tree, and said lifting
step comprises lifting the entire root ball and tree to a
desired height from the ground.
11. The method of claim 10 wherein said digging step
further comprises forming a ramp on one side of the tree
extending from the ground surface to the bottom of the trench,
and said lifting step comprises lifting said root ball high
- 7 -

enough to permit a transport vehicle to be moved down the ramp
and positioned directly below the lifted root ball and tree.
-8-

Description

CA 02224700 1997-12-1~
W O 97141722 PCT~US97/07906
LIFT APPA~U~TU8 7~ND METHOD FOR
TRU~NSP~ING ~REES
BACKGROUND OF THE INVENTION
The present invention generally relates to
transplanting mature trees, and more particularly to an
apparatus and method which permits removal of mature trees from
the ground for transport to a new location.
Generally speaking, numerous arrangements and
associated equipment have been developed through the years for
transplanting trees, shrubs, bushes, etc. All of these known
arrangements involve some form of digging around the base of
the tree to form a root ball, encapsulating the root ball with
a support structure to permit removal of the tree from the
ground, and lifting and loading the tree onto a vehicle for
transport to its new location.
While these approaches have achieved a certain amount
of success, they have not proven entirely satisfactory. More
specifically, when attempting to remove and transplant a mature
tree weighing as much as 20 tons or more, known arrangements
have required the use of very large and expensive motorized
lifting equipment, such as a boom type crane truck. In
addition to high cost, the use of such lifting equipment
suffers the drawbacks of requiring careful and time consuming
deployment of lift cables connecting the root ball harness and
crane, and a larger number of crewmen working in a highly
coordinated effort with the crane operator to insure the tree
is not damaged in the lifting and loading process.
Therefore, a need exists for an improved lifting
apparatus and method which can allow relatively quick and easy
removal of planted or mature trees for transport to a new
location.

CA 02224700 1997-12-1~
W O 97/41722 PCTrUS97/07906
SU~ARY OF THE INVENTION
It is therefore a primary object of the present
invention to provide an apparatus and method for lifting a
planted or mature tree from the ground for transport and
transplanting in a new location which obviates the need for
large motorized lifting equipment, such as boom type crane
truck. In accordance with this and other objects, the present
invention provides a portable lifting apparatus which fits
completely within a trench dug about the base of the tree, and
is arranged to be controllably engageable with at least one
structural support element located on a root ball support
harness. The portable lift apparatus is easily handled and
operated by a minimal number of workers.
Thus, the present invention provides a portable
apparatus for controllably lifting a planted tree from the
ground to permit transport of the tree to a new location
comprises a base support dimensioned so that the entire base
support can be positioned at the bottom of a trench dug about
the tree, and at least one lift mechanism connected to the base
support. The lift mechanism comprises a moveable component
which can be controllably brought into engagement with at least
one support element fastened to a root ball of the tree, and is
arranged to have a range of movement sufficient to lift at
least a portion of the root ball and tree to a desired height
from the ground.
In further accordance with the present invention, a
method for removing a planted tree for transport to a new
location comprises the steps of digging a trench about the tree
base so as to form suitable size root ball, enclosing the root
ball with a support harness, and positioning at least one
portable lift apparatus at the bottom of the trench. The
portable lift apparatus comprises a base support dimensioned so
that the entire base support can fit at the bottom of the
trench, and at least one lift mechanism connected to the base
support having a moveable component integrally formed
therewith. At least a portion of the root ball and tree are
lifted to a desired height from the ground by controllably
-

CA 02224700 1997-12-1~
W O 97/4172Z PCTrUS97/07906
bringing the moveable component into engagement with at least
one support element on the support harness and forcing the
support element in an upward direction.
The present invention will be more fully understood
upon reading the following detailed description of the
preferred embodiment in conjunction with the accompanying
drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. l is a side view of a portable lift apparatus
for lifting a planted tree from the ground in accordance with
present invention.
FIG. 2 is a side view showing the removal of a
planted tree for transport to a new location in accordance with
the present invention; and
FIG. 3 is a partial top view of Fig. 2 looking down
toward the ground.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT(S)
Referring to Figs. 1-3, the present invention
provides a portable lift apparatus and method of use which
permits safe removal of planted or mature trees for transport
and transplanting in a new location without the need for large
cranes or other motorized lifting equipment. As best seen in
Fig. 1, the portable lift apparatus 10 includes a base support
element 12 which is dimensioned to allow positioning of the
entire base support at the bottom of a trench 14 dug about a
tree. In the preferred embodiment, a pair of lifting cylinders
16 and 18 are attached to the base support element 12 so as to
extend perpendicularly therefrom. Each lifting cylinder
comprises a hydraulic or air or gas pressurized piston having
a stationary component 20 and a mating moveable component 22
which can be controllably extended and retracted via an
externally operated switch or lever (not shown) in a manner
well understood by one having ordinary skill in the art.
The lifting cylinders 16 and 18 are coupled together
by a cross-member 24. The cross-m~hPr 24 is connected such as

CA 02224700 1997-12-l~
WO 97/41722 PCT~US97/07906
with a pair of pins 26 to a perforated mounting plate 28
integrally formed on the outer surface of the moveable
component 22 of each lifting cylinder. The pin 26 and
perforated plate 28 mounting arrangement allows the cross-
member 24 to be adjustably mounted at an optimum heightrelative to the base support 12 for a given job.
As best seen in Fig. 3, the method of the present
invention comprises digging the trench 14 about the base of a
tree in any conventional manner to form a root ball. A support
harness or sling 30 is also fastened about the root ball in any
conventional manner. One of ordinary skill in the art will
also readily appreciate that the construction and design of the
support harness 30 can be of any known arrangement.
At least one, and more preferably a pair of I-beam
type support members 32 and 34 are positioned on opposite sides
of the tree trunk and integrally formed or attached to the
support harness 30. In accordance with the present invention,
the support members 32 and 34 extend horizontally beyond the
width of the root ball over the trench 14.
A pair of portable lift apparatus 10 are then
positioned at the bottom of the trench 14 on opposite sides of
the tree trunk so that the cross-member 24 is located directly
below the support members 32 and 34. The moveable member 22 of
each lifting cylinder is then controllably extended to bring
the cross-member 24 into engagement with the support members 32
and 34, and to subsequently exert a sufficient amount of force
so as to lift the root ball and tree off the ground to a
desired height. If a ramp 36 is dug to the trench 14 as shown
in Figs. 2 and 3, a suitable flatbed trailer 38 can be backed
down the ramp and underneath the lifted root ball. The moveable
member 22 of each lifting cylinder can then be controllably
retracted to lower the tree and root ball directly onto the
trailer 38.
Thus, the portable lift apparatus 10 and method of
the present invention advantageously allows a small crew of
workmen to quickly and easily lift and remove large mature

CA 02224700 1997-12-1~
W O 97/41722 PCTrUS97/07906
trees from the ground without using any additional large
motorized lifting equipment, such as a boom type crane truck.
While the preferred embodiment has been described as
including two lifting cylinders 16 and 18 attached to the base
support 12, such an arrangement is not to be construed as
limiting since a single lifting cylinder may be sufficiently
strong enough to lift smaller trees. With such an arrangement,
the cross-member 24 could be attached to the moveable component
in a "T" configuration. Also, one of ordinary skill in the art
will readily appreciate that use o~ a single portable lift
apparatus 10 may be adequate to lift one side of the tree and
root ball to a height sufficient enough to allow a forklift
type of vehicle pull the tree from the ground for loading on
the trailer.
Therefore. it will be understood that the foregoing
description of the preferred embodiment of the present
invention is for illustrative purposes only, and that the
various structural and operational features herein disclosed
are susceptible to a number of modifications, none of which
departs from the spirit and scope of the present invention as
defined in the appended claims.

Dessin représentatif